Method difference

source/core/StarSet.hpp:264–268

template <typename Value, typename Compare, typename Allocator>
Set<Value, Compare, Allocator> Set<Value, Compare, Allocator>::difference(Set const& s) const {
  Set res;
  std::set_difference(Base::begin(), Base::end(), s.begin(), s.end(), std::inserter(res, res.end()));
  return res;
}

template <typename Value, typename Compare, typename Allocator>
Set<Value, Compare, Allocator> Set<Value, Compare, Allocator>::difference(Set const& s, std::function<bool(Value const&, Value const&)> compare) const {